The sister of late pop superstar Prince has promised fans the musician’s vast collection of unreleased music will be made public.

Tyka Nelson said the Purple Rain singer, who died in April 2016 aged 57 “always wanted people to hear his music”.

Prince was renowned across the music industry for building up a vault of unreleased albums and reportedly held more than 50 fully produced music videos which are yet to see the light of day.

BRIT Awards 2006 – Earls Court

Nelson was speaking as she announced a the first official retrospective exhibition celebrating her brother’s legacy and showcasing hundreds of never-before-seen artefacts from his famed Paisley Park estate in Minnesota.

She told the Press Association: “I tell people if I don’t fulfil his wishes I don’t want to get to heaven and have him slap me.

“He wanted to share his music, a lot like my father. As soon as I walked in the room we’d go over to the piano or the computer and he’d go I wrote a new song listen to it.”

Prince's Purple Rain jacket

She added: “He always wanted people to hear his music and I definitely would not leave this planet until I made sure his music is out there.”

Nelson said the My Name Is Prince exhibition, which will run at The O2 in London for just three weeks, will give fans an opportunity to “feel and see” the musician.

It will feature an array instruments, stage outfits, awards and handwritten song lyrics with some items leaving Paisley Park for the first time ever.

It includes Prince’s diamond studded cane from 2015, a raspberry beret cloud suit from 1985 and the Gibson L65 guitar he used on his national television debut on American Bandstand in 1980.